Probactrosaurus, meaning “before Bactrosaurus”, is a genus of early hadrosaurid iguanodont dinosaur from the Early Cretaceous Period. It lived in what is now China. The type species, P. gobiensis, was described in 1966 by A.K. Rozhdestvensky.
This was a herbivorous dinosaur. It was about 20 feet long and had a narrow snout, elongated lower jaw and double rows of flattened cheek teeth. It was possibly related to the duck-billed dinosaurs, with which it shared some common characteristics.